Stopcock



J. S. SHEAFE STOPC OCK Filed Feb. 15, 1922 James Sfiheafe IN VEN TOR.

ATTORNEY.

Patented fies. 9, 1924.

UNITED STATES ldlildtitt PATENT QFFlQE.

STOPCOCK.

Application filed February 15, 1922.

To all whom it may concern:

Be it known that I, JAMEs S. Srrnern, a citizen of the United States, residing at Evanston, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Stopcocks, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

This invention relates to angle cocks for railway use and has for its object the provision of a cock which shall be cheaper to make and easier to manipulate than previous cocks, as well as being of longer life and less subject to leakage.

In the accompanying drawing I have illustrated one of the physical forms in which my inventive idea can be embodied. Fig. 1 is a longitudinal sectional view of my im- 2 proved cock as completed; Fig. 2 shows the body and bushing prior to assembling; and Fig. 3 illustrates the preferred mode of securing said parts together.

1 represents the body of the cock, which 15 is preferably made of cast iron, and 2 the turning plug which is held in place by a spring 3 and screw cap 4, a curved handle 5 being provided to turn the same. The plug can be made either of brass or of other suitable metal. It has been customary to form a seat in the body by the use of a tapered reamer. However the sand grains and other hard nodules frequently occurring in such iron castings have been very hard on the 5 tools, with the result that the tool has been a serious item in the manufacture. For this and other reasons it has been so difiicult to get a tight fit between the iron body and the member adjacent thereto that wax has often been employed to secure temporary tightness, which becomes disintegrated in time by the movement of the member.

According to my invention I interpose be tween the plug and body a tapered sleeve 6 of a suitable malleable metal, preferably of a non-corrodible nature like brass. To secure it rigidly and permanently in place I form the body with a narrow chamfer 7 merging with the smaller end of the tapered recess in which the sleeve is located, and I form the smaller end of the sleeve with an annular integral ridge 8 adjacent to its outer surface. After pressing the sleeve into place I Serial No. 536,618

then spin, peen, or otherwise upset the metal of this ridge so as to fill the aha-infer and lock the sleeve against removal. This alone is generally suilicient to hold the sleeve against rotation although added security can be obtained by the use of one or more pins 3 penetrating the walls of the sleeve and 'o y.

While I do not restrict myself thereto the best mode I have so far developed for upsetting this ridge is by means of the tools shown in Fig. 3. 10 represents a suitable jig set on the platen of a drill press. The movable tool comprises a shank 11 having a fiat circular flange 12 providing a downwardly facing shoulder 13 beneath which are a plurality of equally spaced rollers 14, 14, loosely sleeved on radial arms 15. These arms are provided with heads 16 which force the rollers to travel in a circle, but the downward pressure is exerted solely by the flange. These roll the end of the sleeve into the surrounding groove without breaking the metal. The jig has a portion 17 which engages the bottom of the sleeve to resist the pressure of the spinning tool, and it is best to support the upper end of the sleeve also by a suitable plug 18 which may be either integral with the jig or separately driven into the sleeve to prevent the tool from swaging the same inwardly.

I prefer to make the sleeve of forged brass which entails a minimum of waste. The recess in the body can be reamed with a boring bar or the like inexpensive tool. It is best to have it fit the sleeve fairly snugly but leakage can be prevented by the use of a suitable cement. I find that daubing the sleeve with paint affords excellent security. The sleeve being soft I am able to grind the plug to its seat with emery or the like abrasive and thus secure a much better joint than with iron. The saving in tool cost more than offsets the extra cost of the sleeve and enables a better article to be made for less money. Besides the sleeve can be substantially completely finished before being applied to the body, thus necessitating a minimum of handling of the latter.

I do not, however, confine myself to brass as a material, nor restrict myself in any other way except asset forth in the annexed 1 claim.

Having thus described my invention What I claim is:

For use in formin a device of the character herein describe a sleeve of malleable 5 metal having an exterior surface formed frustro-conical to cooperate with a complementary interior surface of a body member,'

projecting ridge arranged to be rolled outwardly to form a radially projecting ridge adapted to extend into a counterbore in said.

signature.

JAMES S. SHEAFE. 

